Fluid composition for compounding, impregnating, and coating



batented Bees 18, 1923.

REGINALD EERCY LIEQPOLD BRITTQH, 0F LONDQE,'ENG-WTD, AWSTGEQE E6 EROS. & COMPANY LQNDQN LIMITED, 0E LQHDQBI, Ellllfkfihlfi, a. ERITEQE LWI'QLITY GOMPAKY.

FLUID GQMPGEITIN sou @QEEFQUELDEEG,

lilo Brewing.

To all whom it may concern:

Be it hown that l, REGINAIJ) Furor LEO- ronn Bmrron, a subject of the King of England, residing at Wimbledon Park, London, England, have invented certain new and useful improvements in Fluid Compositions for Compounding, impregnating, and Goat'- ing, of which the following is a specification.

have found that silicic acid in the form of an irreversible colloidal solution may be advantageously applied to the treatment of solids for compounding with or coating the same, and in particular is adaptable with advantage to the impregnation or coatin for preservative and decorative purposes 0 fibrous or porous substances, such as wood, brickwork, concrete, cement or the like. The colloid being irreversible on passage ,from the sol to the gel state for instance,

by dehydration) there results a deposition upon the material treated with the solution of an amorphous, water-insoluble substance which is resistant to atmospheric influence, and to the action of common acids and most of the usual solvents.

Accordin to the present invention, therefore, t are is used as a composition for coating, impregnation, compounding and like purposes, or as a medium for colour. an irreversible alkaline silicoesol.

The sol ma be silicic acid peptised in a solution of al all or of an alkaline silicate.

The sol may be prepared by any desired method, such for instance, as follows (a) The addition of acid to a soluble silicate in such manner as to precipitate the silioic acid in gelatinous or granular form, the precipitate being purified by washing and filtering, say in a bag-press, and then peptised by grinding with a small quantity of an alkaline SOllllllOIfL (63 The h dration of sand or silica by grin ing, an /or'heating, with water, followed by peptisation of the hydrated product by grinding with alkali.

.(c) The peptisation, for instance, by grinding, of silica or diatomaceous-earth in solutions of water-glass ,'with or without separation of the unpeptised material which may act as an adsorbent for the caustic alkali produced b hydrolysis.

- One preferre form of colloidal siliciccaustic cadence.

Application also as ess ices. a mo.

acid use according to this invention consists of a sol bovine" substantially 4) per cent of tree silica, ill, calculated on the dry material.

This sol of high silica may be pre ared in the following;-

ilieic acid is precipitated from soluble silicate, or commercial water-glass solution,

tact therewith will not undergo repeptisation.

lnutiliaing; the sol for the production of a paint, a mineral pigment, such, for example, as lead cliromate, lead sulphate or lithopone, or a suitable organic colouring 1 matter, is compounded with the colloidal solution in the requisite relative quantities to give a paint of the desired Trepared with mineral pigments, such paints are applicable for arti les liable to be exposed to high temperatures, and these paints are protective to combustible mate rials such as wood, fabric and the lilac.

Such paints are also applicable as washable distempers or wall finishes. Lilrewise the sol may be used as a component of enamel or as a varnish or lacquer or corn mituent thereof.

Porous concrete vessels, such, for example as tanks treated with the sol are rendere proof against the action of petrol, oil the like. The solution may also be used a dressing for cemented surfaces, asbestos boards, and other surfaces liable to shredding or rubbing.

compounded with suitable fillers such cork-dust the sol may be used for floor-dressing, and to provide substitutes for linoleum, By'compounding with asbestos powder, or other appropriate disintegrated material, with or without colouring matters, so as to form a paste, a product is obtained suitable for cementing articles together or for moulding objects. Colloidal silicic acid col and as an acid-resistant cement.

I claim 1. The process which comprises bringing an irreversible alkaline silico-sol into contact with a solid and depositing silica from the sol in an insoluble form upon the sub-- stance of the solid.

an irreversible alkaline silico-sol into contact with a porous solid and depositing silica from the sol in an insoluble form upon the substance of the solid.

3. Theprocess which comprises bringing an irreversible alkaline silico-sol into contact with a solid in a disintegrated state and depositing silica from the sol in an insoluble form n n the substance of the solid.

4. T e process which comprises bringing an irreversible alkaline silico-sol into contact with a solid surface and depositing silica in an insoluble form upon the surface.

5. The process which comprises coatin a solid bod with an irreversible alkallne silicic aci sol com ounded with a solid pigment and then efl zecting deposition of the pigment and of silica from the sol in an insoluble form upon the solid.

6. The process which comprises bringing an irreversible alkaline silicic acid sol into irom the sol in an insoluble 2. The process which comprises bringing of the solid by the action ofheat.

7. The process which an irreversible alkaline silicic acid sol having a content in free silica of substantially 90%, calculated on the dry material, into contact with a solid and de siting silica i'm upon the comprises bringing substance of the solid.

composition of matter comprising an irreversible alkaline silico-sol and a compounding material.

A composition of matter comprisin an irreversible alkaline silicic acid sol and a compounding material in the form of a disintegrated solid.

10. A composition of matter com rising an irreversible alkaline silicic acid sol and a compounding material in the form of a disintegrated colour giving solid.

11. A compositionof matter comprising an irreversible alkaline silicic acid soland a compounding material in the form of a disintegrated mineral pigment.

12. A composition of matter comprising an irreversible a compounding material in the form of a disintegrated solid resistant to heat.

In testimony whereof I aflix m signature.

REGINALD PERGY LEOPOLD BRITTOR.

alkaline silicic acid sol and 

